meteorology

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• Introduction
  • Modeling Protocols and Submittals
  • Screening Modeling
  • Refined Modeling
  • Increment Modeling
  • Class I Areas
  • Meteorological Data
  • Background Data
  • Presentation of Results
  • Reference and Links
• Air Quality Forecasting
• Regional Haze

Presentation of Results

After the protocol has been submitted to MEDEP-BAQ and approved, the air quality dispersion modeling analysis is to be conducted to demonstrate compliance with all applicable MAAQS and Class I/Class II increment standards. In addition, it must be also demonstrated that there has been no adverse impact to all Class I AQRVs. Once compliance with all of the applicable standards has been demonstrated, the applicant must then prepare and submit a detailed summary report documenting the source being modeled, the modeling efforts, the compliance demonstration (requirements are set forth in Chapters 115 and 140) as well as ALL input, output and diagnostic modeling files.

The final modeling results should be compiled in such a way as to help the project meteorologist in their review. Some of the information included in the final submittal will likely be similar to information previously submitted in the modeling protocol. Any assumptions or data introduced in the protocol (or previous analyses) that is necessary to demonstrate compliance should be restated in the final modeling submittal. Simply referencing the assumptions or data to previous submittals will not be sufficient. Understand that having all necessary information in one document will make for an easier and more timely review! The submittal should minimally contain:

• overviews/summaries of:

• tables of all necessary stack inputs (physical stack parameters, emission rates, flows, etc.) in a logical manner for ALL modeled stacks (proposed, current actual and baseline stacks) in both English and metric units. Stack inputs should be carried out to a minimum of 2 decimal places. For UTM coordinates, please include the datum (NAD27 or NAD83) that the coordinates were derived from, rounded to the nearest meter.

• tables that list the maximum impact (H1H or H2H, depending on the pollutant/averaging period), the receptor location (Easting/Northing coordinates) as well as elevation of the receptor for each model run. Maximum impacts should be carried out to a minimum of 2 decimal places. Also, include the meteorological period (YYMMDDHH) predicting the maximum impact for each pollutant/averaging period. This methodology should be carried out for each pollutant and year of meteorological data.

• comparison of modeling results to applicable Class II MAAQS and increment standards

• comparison of modeling results to applicable Class I AQRV analyses

• all input, output and diagnostic (meteorological data, DEM data, etc.) files used to demonstrate compliance. Please include a directory of file(s) contained on the CD-ROMs or diskettes. Using a logical naming scheme for your modeling files will make for an easier and more timely review!

The project meteorologist can easily provide you with examples of the best way to summarize your results to aid in his/her review.

It is very important to bind your analysis! Three-ring binders or plastic binding is preferable. Unbound documents and/or supplemental submittals are very difficult to keep together. Please do not submit analyses in boxes, folders and/or other containers.